By virtue of the skin effect of high‑frequency current, high‑frequency electrical energy can be concentrated in the surface layer of the weldment. Meanwhile, the proximity effect enables control over the path and distribution of high‑frequency current flow. To concentrate high‑frequency current at a specific region of the weldment, this can be achieved simply by forming a current loop between the conductor and the weldment, and positioning the conductor adjacent to the target region to establish a mutually adjacent conductor configuration.
